Mobile device for power reduction and method thereof

ABSTRACT

A device and a method for saving power in a mobile electronic device are provided. A mobile electronic device includes a plurality of antennas and a transceiver, wherein the transceiver includes a control unit configured to switch to a low power mode to operate in the low power mode, or to operate at least one of the plurality of antennas in the low power mode when a data non-transmission period occurs for a predetermined time in an active state.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims the benefit under 35 U.S.C. §119(e) of a U.S.Provisional application filed on Mar. 6, 2013 and assigned Ser. No.61/773,402, and under 35 U.S.C. §119(a) of a Korean patent applicationfiled on Apr. 5, 2013 in the Korean Intellectual Property Office andassigned Serial number 10-2013-0037600, the entire disclosure of each ofwhich is hereby incorporated by reference.

TECHNICAL FIELD

The present disclosure relates to an electronic device. Moreparticularly, the present disclosure relates to technology for reducingpower consumption of a mobile electronic device.

BACKGROUND

Electronic devices have been developed to provide greater mobility andconvenience for users. Cell phones and smartphones of the related artare representative mobile electronic devices. In the field of computers,instead of desktop computers, wireless laptops and wireless tablets areincreasingly used. Digital cameras also have developed to be wirelesslyoperated.

Such mobile devices are supplied with power from batteries with limitedcapacities. Therefore, techniques for maintaining a battery for a longtime using low power and extending the life of the battery are needed.In particular, as various multimedia services such as a broadcastservice, a wireless interne service, a camera service, and a musicplayback service are provided through such mobile devices, it becomesbeneficial to develop power saving techniques for efficiently saving thepower of batteries of the mobile devices and extending lives thereof.

The above information is presented as background information only toassist with an understanding of the present disclosure. No determinationhas been made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the present disclosure.

SUMMARY

Aspects of the present disclosure are to address at least theabove-mentioned problems and/or disadvantages and to provide at leastthe advantages described below. Accordingly, an aspect of the presentdisclosure is to provide devices and methods for saving power in amobile electronic device.

Another aspect of the present disclosure is to provide devices andmethods for extending a life of a battery of a mobile electronic devicedriven by the battery and provided with a wireless multimedia service.

In accordance with an aspect of the present disclosure, a mobileelectronic device is provided. The mobile electronic device includes aplurality of antennas, and a transceiver, wherein the transceiverincludes a control unit configured to switch to a low power mode tooperate in the low power mode, or to operate at least one of theplurality of antennas in the low power mode when a data non-transmissionperiod occurs in an active state.

In accordance with another aspect of the present disclosure, a mobileelectronic device is provided. The mobile electronic device includes aplurality of antennas, and a transceiver, wherein the transceiverincludes a control unit configured to block at least one path betweenthe transceiver and the plurality of antennas when a datanon-transmission period occurs in an active state.

In accordance with another aspect of the present disclosure, a mobileelectronic device is provided. The mobile electronic device includes atransceiver including a plurality of components, wherein the transceiverincludes a control unit configured to adjust power supplied to at leastone of the plurality of components to a low-power mode when a datanon-transmission period occurs in an active state.

In accordance with another aspect of the present disclosure, a methodfor reducing power consumption of a mobile electronic device including aplurality of antennas and a transceiver is provided. The method includesdetecting occurrence of a data non-transmission period in an activestate, and operating the transceiver in a low power mode or operating atleast one of the plurality of antennas in the low power mode throughswitching to the low power mode when the occurrence of the datanon-transmission period is detected in the active state.

In accordance with another aspect of the present disclosure, a methodfor reducing power consumption of a mobile electronic device including aplurality of antennas and a transceiver is provided. The method includesdetecting occurrence of a data non-transmission period in an activestate, and blocking at least one path between the transceiver and theplurality of antennas when the occurrence of the data non-transmissionperiod is detected in the active state.

In accordance with another aspect of the present disclosure, a methodfor reducing power consumption of a mobile electronic device including atransceiver having a plurality of components is provided. The methodincludes detecting occurrence of a data non-transmission period in anactive state, and making a low-power adjustment of power supplied to atleast one of the plurality of components to a low-power mode when theoccurrence of the data non-transmission period is detected in the activestate.

In accordance with another aspect of the present disclosure, a mobileelectronic device is provided. The mobile electronic device includes aplurality of antennas, a transceiver, and a control unit configured toswitch to a low power mode to operate the transceiver in the low powermode, or to operate at least one of the plurality of antennas in the lowpower mode when a data non-transmission period occurs in an activestate.

In accordance with another aspect of the present disclosure, a mobileelectronic device is provided. The mobile electronic device includes aplurality of antennas, a transceiver, and a control unit configured toblock at least one path between the transceiver and the plurality ofantennas when a data non-transmission period occurs in an active state.

In accordance with another aspect of the present disclosure, a mobileelectronic device is provided. The mobile electronic device includes atransceiver including a plurality of components, and a control unitconfigured to adjust power supplied to at least one of the plurality ofcomponents to a low-power mode when a data non-transmission periodoccurs in an active state.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses various embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the present disclosure will be more apparent from thefollowing description when taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a diagram illustrating a state transition of Radio ResourceControl (RRC) in a 3rd Generation (3G) communication system according toan embodiment of the present disclosure;

FIG. 2 is a diagram illustrating a state transition of RRC in a 4thGeneration (4G) communication system according to an embodiment of thepresent disclosure;

FIG. 3 is a diagram illustrating a transition of a power mode in a 3Gcommunication system according to an embodiment of the presentdisclosure;

FIG. 4 is a diagram illustrating a transition of a power mode in a 4Gcommunication system according to an embodiment of the presentdisclosure;

FIGS. 5A, 5B, 5C, and 5D are block diagrams illustrating a mobileelectronic device for a power saving operation according to variousembodiments of the present disclosure;

FIG. 6 is a flowchart illustrating a process of a power saving operationaccording to an embodiment of the present disclosure;

FIG. 7 is a flowchart illustrating a process of a power saving operationaccording to another embodiment of the present disclosure;

FIG. 8A is a diagram illustrating that power consumption is reducedaccording to the related art;

FIG. 8B is diagram illustrating that power consumption is reducedaccording to an embodiment of the present disclosure;

FIG. 9A is a diagram illustrating that power consumption is reducedaccording to the related art;

FIG. 9B is a diagram illustrating that power consumption is reducedaccording to an embodiment of the present disclosure; and

FIGS. 10A, 10B, and 10C are diagrams illustrating various modificationsof a power saving operation according to various embodiments of thepresent disclosure.

Throughout the drawings, it should be noted that like reference numbersare used to depict the same or similar elements, features, andstructures.

DETAILED DESCRIPTION

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of variousembodiments of the present disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the various embodiments describedherein can be made without departing from the scope and spirit of thepresent disclosure. In addition, descriptions of well-known functionsand constructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of the presentdisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of various embodiments of the presentdisclosure is provided for illustration purpose only and not for thepurpose of limiting the present disclosure as defined by the appendedclaims and their equivalents.

In this specification, FIGS. 1 to 10C and the various embodiments areused to merely describe the principles of the present disclosure, andthus should not be construed as limitations on the scope of the presentdisclosure.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

Various embodiments of the present disclosure described below relate todevices and methods for saving power in a mobile electronic device.Various embodiments of the present disclosure are applied to terminalssuch as smartphones and cell phones that access a wireless communicationnetwork such as a 3^(rd) Generation (3G) system or a 4^(th) Generation(4G) Long Term Evolution (LTE) system to perform communication. However,it will be understood by those skilled in the art that variousembodiments of the present disclosure may also be applied to electronicdevices such as wirelessly accessible laptops, tablets, digital camerasdriven by batteries, and the like.

State transition operations for supporting low-power communications interminals of 3G and 4G wireless communication systems are describedbelow. Power mode transition operations for power saving operations inthe terminals according to various embodiments of the present disclosurewill also be described. Power saving operations according to variousembodiments of the present disclosure will also be described.

FIG. 1 is a diagram illustrating a state transition of Radio ResourceControl (RRC) in a 3G communication system according to an embodiment ofthe present disclosure. 3rd Generation Partnership Project (3GPP)wireless communication standards support low-power communication bycontrolling a transmitting/receiving state of a terminal through RRC.

Referring to FIG. 1, in a Cell_Dedicated Channel (CELL_DCH) state 110, aterminal is in an active state and may instantly transmit or receivedata. Because both a Receiver (Rx) and a Transmitter (Tx) are operating,power consumption is high. In a cell_forward access channel (CELL_FACH)state 120, the terminal is in a high power idle state and may instantlyrespond to a request from a base station. In this state, only a downlink(DL) is operated. Because the Tx does not consume power, powerconsumption is lower than that of the CELL_DCH state 110. However,because the Rx is activated, power is continuously consumed. In acell_paging channel (CELL_PCH) or (URA_PCH) state 130, the terminal isin an idle state and may receive only paging from a base station. Inthis state, only the DL is periodically woken up to monitor the paging.Because a period where a modulator and demodulator (modem) is active isminimized, power consumption is low in comparison with the CELL_DCHstate 110 or the CELL_FACH state 120. According to 3GPP standards, aninactivity timer t1 is defined for a state transition from the CELL_DCHstate 110 to the CELL_FACH state 120, and an inactivity timer t2 isdefined for a state transition from the CELL_FACH state 120 to theCELL_PCH state 130. As will be discussed in more detail with referenceto FIG. 8A, after a period P2 where data transmission occurs, the basestation changes the CELL_DCH state 110 to the CELL_FACH state 120 afterwaiting for inactivity timer t1 to trigger the transition. Here, theinactivity timer represents a redundant wait time that passes in a statewhere data transmission does not occur before the state transition. Thatis, the inactivity timer t1 represents a time for waiting in the statewhere data transmission does not occur before the CELL_DCH state 110 ischanged to the CELL_FACH state 120, and the inactivity timer t2represents a time for waiting until the CELL_FACH state 120 is changedto the CELL_PCH state 130.

Referring to a 3GPP network, the base station monitors data traffic andinitiates the state transitions of RRC so as to minimize powerconsumption of the terminal. However, for the state transition of RRC,an additional signal message may be transmitted/received, thus causingoverhead. Further, in the case where a period of traffic stop issufficiently long, i.e. in the case where an inactivation period isgreater than a determined value of inactivity timer, the statetransition of RRC occurs. For example, in the case where datatransmission does not occur during the inactivity timer t1, the CELL_DCHstate 110 is changed to the CELL_FACH state 120. Further, in the casewhere the data transmission still does not occur during the inactivitytimer t2, the CELL_FACH state 120 is changed to the CELL_PCH state 130.

FIG. 2 is a diagram illustrating a state transition of RRC in a 4Gcommunication system according to an embodiment of the presentdisclosure.

Referring to FIG. 2, an RRC_CONNECTED state 210 is an active state inwhich transmission/reception of data is enabled. In this state, powerconsumption of a transmitter/receiver is high. An RRC_IDLE state 220 isan idle state in which only reception of paging is enabled. In the caseof the 4G system, when data transmission does not occur during theinactivity timer t1, the RRC_CONNECTED state 210 is changed to theRRC_IDLE state 220 to thereby reduce power consumption.

Besides the above-described low-power operation methods, a method ofcontrolling a physical layer regardless of the RRC state may beconsidered. For example, a diversity antenna may be switched off.However, according to this method, due to reception performancedegradation, a data transmission time becomes longer, and thus powerconsumption may increase.

As described above, in the case of the low-power operation method by thestate transmission of RRC, a message overhead and transition time aregreat. Therefore, the state transition is allowed to occur only when adata stop period is 5-10 seconds or longer to be sufficiently long byincreasing the inactivity timer. However, as wireless communicationstandards develop, a data transmission rate greatly increases, and thusa period used for actual data transmission in a high-power operationstate of a terminal greatly decreases. Therefore, the low-poweroperation method by the state transition of RRC is limited in terms ofreduction of power consumed in a data non-transmission period. In thecase of the low-power operation method for the physical layer, a datareception rate may decrease. Thus, application of this method islimited.

In order to overcome the limitations, according to various embodimentsof the present disclosure, in the active state, i.e. the CELL_DCH orRRC_CONNECTED state, a data transmission state is observed to operate aterminal in a low-power mode when a data non-transmission period wheredata transmission/reception does not occur is detected.

FIG. 3 is a diagram illustrating a transition of a power mode in a 3Gcommunication system according to an embodiment of the presentdisclosure.

Referring to FIG. 3, the active state illustrated in FIG. 1, i.e. theCELL_DCH state 110, is divided into a CELL_DCH normal power mode 112 anda CELL_DCH low power mode 114. The terminal switches from the CELL_DCHnormal power mode 112 to the CELL_DCH low power mode 114 after a lapseof an inactivity timer t11 that is smaller than t1. That is, when thedata non-transmission period where data transmission/reception does notoccur for the predefined time t11 is detected, in the active state wheredata transmission/reception is enabled, the terminal switches from theCELL_DCH normal power mode 112 to the CELL_DCH low power mode 114. Here,the predefined time t11 is shorter than the time t1 that is defined fortransition from the active state 110 to the high-power idle state 120 asillustrated in FIG. 1. Thereafter, when it is determined that there isdata to be transmitted or received by detecting a control channel (e.g.a high speed-shared control channel (HS-SCCH)), the terminal returns tothe CELL_DCH normal power mode 112 from the CELL_DCH low power mode 114.For example, when it is determined that there is data allocated to theterminal, i.e. data to be received by the terminal, by detecting theHS-SCCH from the base station, the terminal returns to the CELL_DCHnormal power mode 112 from the CELL_DCH low power mode 114. For anotherexample, when it is determined that there is data to be transmitted tothe base station, the terminal returns to the CELL_DCH normal power mode112 from the CELL_DCH low power mode 114. In this manner, after theterminal switches to the active state, power consumption may be reducedin a period where data transmission/reception does not occur.

FIG. 4 is a diagram illustrating a transition of a power mode in a 4Gcommunication system according to an embodiment of the presentdisclosure.

Referring to FIG. 2, the RRC_CONNECTED state 210 is divided into anRRC_CONNECTED normal power mode 212 and an RRC_CONNECTED low power mode214. The terminal switches from the RRC_CONNECTED normal power mode 212to the RRC_CONNECTED low power mode 214 after a lapse of an inactivitytimer t11 that is smaller than t1. That is, when the datanon-transmission period where data transmission/reception does not occurfor the predefined time t11 is detected, in the active state where datatransmission/reception is enabled, the terminal switches from theRRC_CONNECTED normal power mode 212 to the RRC_CONNECTED low power mode214. Here, the predefined time t11 is shorter than the time t1 that isdefined for transition from the active state 210 to the idle state 220as illustrated in FIG. 2. Thereafter, when it is determined that thereis data to be transmitted/received, the terminal returns to theRRC_CONNECTED normal power mode 212 from the RRC_CONNECTED low powermode 214. For example, when it is determined that there is dataallocated to the terminal, i.e. data to be received by the terminal, bydetecting a Physical Downlink Control Channel (PDCCH) from the basestation, the terminal returns to the RRC_CONNECTED normal power mode 212from the RRC_CONNECTED low power mode 214. For another example, when itis determined that there is data to be transmitted to the base station,the terminal returns to the RRC_CONNECTED normal power mode 212 from theRRC_CONNECTED low power mode 214. In this manner, after the terminalswitches to the active state, power consumption may be reduced in aperiod where data transmission/reception does not occur.

FIGS. 5A to 5D are block diagrams illustrating a mobile electronicdevice for a power saving operation according to an embodiment of thepresent disclosure. These configurations are merely examples of applyingvarious embodiments of the present disclosure to a wireless terminal.Therefore, it should be noted that various embodiments of the presentdisclosure are not limited to the configurations and may be used inother similar electronic devices.

Referring to FIGS. 5A to 5D, the mobile electronic device includes acontrol unit 510, a battery 520, a transceiver 505, and an antenna unit500. The antenna unit 500 includes a plurality of antennas ANT1 to ANT3.The battery 520 supplies operating power to components of the electronicdevice. The transceiver 505 performs a transmission process to a signalto be transmitted and performs a reception process to a received signal.As illustrated in FIGS. 5C and 5D, the transceiver 505 may include aBaseband (BB) unit 530 and a radio frequency (RF) unit 540. For example,as illustrated in FIGS. 5A and 5B, the transceiver 505 may beimplemented as a single chip. For another example, as illustrated inFIGS. 5C and 5D, the transceiver 505 may be implemented as two chips.For another example, the transceiver 505 may be implemented as three ormore chips.

The BB unit 530 of the transceiver 505 processes data to be transmittedin a baseband, and processes received data processed in the RF unit 540in the baseband. For example, as shown in FIGS. 10A to 10C, the BB unit530 may include digital BB units 532 and 534 having processors andmemories and analog BB units 536 and 538 having Analog-to-DigitalConverters (ADCs) and filters. The RF unit 540 performs an RF process tothe data to be transmitted, which have been processed in the BB unit530, and performs the RF process to the data received through theantenna unit 500. For example, the RF unit 540 may include an analogfilter, a Low-Noise Amplifier (LNA), a mixer, a Voltage-ControlledOscillator (VCO), a frequency synthesizer, and a Power Amplifier (PA).The plurality of antennas ANT1 to ANT3 included in the antenna unit 500is for signal transmission between the base station and the mobileelectronic device, i.e. the wireless terminal, in a wirelesscommunication system. Although it is illustrated that the plurality ofantennas are not classified into transmitting antennas and receivingantennas, the plurality of antennas may include an appropriate number oftransmitting antennas and an appropriate number of receiving antennas.

The control unit 510 controls a power saving operation according tovarious embodiments of the present disclosure. To this end, the controlunit 510 controls the transceiver 505 and controls an operation of atimer (not illustrated) (e.g. inactivity timer t1, t11, and t2). Thatis, the control unit 510 may control the transceiver 505 so that thetransceiver 505 is operated in a normal power mode or a low power mode.The normal power mode represents a mode in which power is normallysupplied. This normal power mode is a relatively high power mode incomparison with the low power mode. On the contrary, the low power modeis a mode for reducing power consumption of the mobile electronicdevice. In this mode, power is adjusted to be supplied in comparisonwith the case where power is normally supplied.

Referring to FIG. 5A, the control unit 510 may be separated from thetransceiver 505. For another example, as illustrated in FIG. 5B, thecontrol unit 510 may be included in the transceiver 505. In the casewhere the control unit 510 is included in the transceiver 505 and thetransceiver 505 includes the BB unit 530 and the RF unit 540, thecontrol unit 510 may be included in the BB unit 530 or the RF unit 540.

For example, in the low power mode, partial antennas from among theplurality of antennas ANT1 to ANT3 included in the antenna unit 500 maybe turned off. As illustrated in FIG. 10A, the control unit 510 maycontrol an antenna path unit 550 in response to a power mode controlsignal so as to block paths between the partial antennas and thetransceiver 505, thereby turning off the partial antennas. Here, powersupplied to corresponding components of the RF unit (e.g. the analogfilter, low-noise amplifier, and mixer) is also blocked. Although it isillustrated that the antenna unit 500 includes only the plurality ofantennas ANT1 to ANT3, this configuration is just an example. Foranother example, the antenna unit 500 may include partial elements (e.g.capacitor) supplied with power, in addition to the plurality of antennasANT1 to ANT3. In this case, the operation of turning off the partialantennas may include an operation of blocking the paths between thepartial antennas and the transceiver 505 and an operation of blockingthe power supplied to the partial elements. By blocking only the powersupplied to the partial elements, an effect of power saving may beobtained. By additionally blocking the power supplied to thecorresponding components of the RF unit, the power saving effect may beimproved.

For another example, an adjusted voltage supplied in the low power modemay have a lower level than that of a voltage normally supplied topartial components (e.g. power amplifier) of the transceiver 505. Foranother example, an adjusted voltage supplied in the low power mode maybe a voltage that enables partial components (e.g. analog-to-digitalconverter) of the transceiver 505 to perform only partial operations(e.g. 5-stage conversion operation) of normal operations (e.g. 10-stageconversion operation).

In one embodiment, the control unit 510 changes a power mode of theelectronic device into the low power mode when a data non-transmissionperiod is detected during a predefined time in an active state. Thepredefined time may be set to be shorter that a time set to change theactive state to an idle state.

The control unit 510 detects the data non-transmission period where datatransmission/reception does not occur during the predefined time bymonitoring a control channel or transmission data in the active state.When the control unit 510 detects that there is data to be received as aresult of monitoring the control channel in the low power mode, thecontrol unit 510 further performs an operation of changing a powersupply mode of the electronic device into the normal power mode. Whenthe control unit 510 detects that there is data to be transmitted as aresult of monitoring the transmission data in the low power mode, thecontrol unit 510 further performs the operation of changing the powersupply mode of the electronic device into the normal power mode. Thecontrol channel may be one of the HS-SCCH and the PDCCH.

In the low power mode, the control unit 510 low-power adjusts powersupplied to a partial component of the electronic device. The partialcomponent of the electronic device may be one of the radio frequencyunit and the baseband unit. When the data non-transmission period wheredata reception does not occur for the predefined time is detected in theactive state, the partial component of the electronic device may be acomponent on a reception path. When the data non-transmission periodwhere data transmission does not occur for the predefined time isdetected in the active state, the partial component of the electronicdevice may be a component on a transmission path.

In another embodiment, the control unit 510 blocks at least one of thepaths between the transceiver and the plurality of antennas when thedata non-transmission period is detected during the predefined time inthe active state where data transmission/reception is enabled. Thetransceiver includes the radio frequency unit and the baseband unit. Thepredefined time may be set to be shorter that the time set to change theactive state to the idle state.

The control unit 510 detects the data non-transmission period where datatransmission/reception does not occur during the predefined time bymonitoring the control channel or transmission data in the active state.When the control unit 510 detects that there is data to betransmitted/received as a result of monitoring the control channel ortransmission data, the control unit 510 further performs an operation ofopening the blocked paths between the transceiver and the plurality ofantennas. The control channel may be one of the HS-SCCH and the PDCCH.

In another embodiment, the control unit 510 low-power adjusts powersupplied to at least one of a plurality of components included in thetransceiver when the data non-transmission period is detected during thepredefined time in the active state where data transmission/reception isenabled. The transceiver includes the radio frequency unit and thebaseband unit. The predefined time may be set to be shorter than a timeset to change the active state to an idle state.

The control unit 510 detects the data non-transmission period where datatransmission/reception does not occur during the predefined time bymonitoring the control channel or transmission data in the active state.When the control unit 510 detects that there is data to betransmitted/received as a result of monitoring the control channel ortransmission data, the control unit 510 further performs an operation ofnormalizing the low-power adjusted power. The control channel may be oneof the HS-SCCH and the PDCCH.

FIG. 6 is a flowchart illustrating a process of a power saving operationaccording to an embodiment of the present disclosure. This process maybe controlled by the control unit 510 illustrated in FIGS. 5A to 5D.Here, it will be exemplarily described that the power saving operationis performed in the case of a downlink from a base station to aterminal. However, it should be noted that this power saving operationmay be performed in substantially the same manner in the case of anuplink from the terminal to the base station.

Referring to FIG. 6, a timer value is initialized to be 0 in operation602. In operations 604 and 606, demodulation and decoding operations areperiodically performed to the control channel such as the HS-SCCH orPDCCH. When it is detected that a result of the decoding operation issuccessful in operation 608, it is determined that there is data to betransmitted from the base station to the terminal, and the timer valueis initialized to be 0 in operation 610. It is determined whether acurrent power mode is the low power mode in operation 612. In the caseof the low power mode, the power mode is changed to the normal powermode to receive data in operation 614. In the case of the normal powermode, the process proceeds to operation 604. According to data packetsarriving in each cycle, the operations of the right loop(604→606→608→610→612 or 604→606→608→610→612→614) are repeated.

When a data packet is not received, a result of the decoding operationfor the control channel such as the HS-SCCH or PDCCH is determined to bea failure. When the result of the decoding operation is determined to bea failure, the timer value increases in operation 616. The operations ofthe left loop (604→606→608→616→618) are repeatedly performed until thetimer value reaches t11. When it is determined that the timer valuereaches t11 in operation 618, it is determined that the data packets arenot received for a while, and the power mode is changed to the low powermode in operation 620.

FIG. 7 is a flowchart illustrating a process of a power saving operationaccording to another embodiment of the present disclosure. This processmay be controlled by the control unit 510 illustrated in FIGS. 5A to 5D.Here, it will be exemplarily described that the power saving operationis performed in the case of a downlink from a base station to aterminal. However, it should be noted that this power saving operationmay be performed in substantially the same manner in the case of anuplink from the terminal to the base station. Operations 702 to 714 arethe same as operations 602 to 614 illustrated in FIG. 6, and operations720, 722, and 726 are the same as operations 616, 618, and 620illustrated in FIG. 6. That is, the process illustrated in FIG. 7further includes operations 716, 718, and 724 in comparison with theprocess illustrated in FIG. 6.

Referring to FIG. 7, before switching to the low power mode afterreception of data is stopped, it is determined whether signal quality issufficiently high to decode a control channel that will be possiblyreceived. When a data packet is not received in the left loop, a resultof the decoding operation of the control channel such as the HS-SCCH orPDCCH is determined to be a failure. In operation 716, a value of signalquality such as a Signal to Interference Ratio (SIR) is determined. Whenthe signal quality value is greater than a threshold value, the powermode is changed to the low power mode in operation 726. When the signalquality value is not greater than the threshold value, the power mode ischanged to the normal power mode in operation 718. That is, the SIRlevel is determined again in order to decode the common control channelsuch as the HS-SCCH or PDCCH that indicates data that will possiblyarrive, even after data transmission is stopped.

FIGS. 8A and 8B are diagrams illustrating that power consumption isreduced according to embodiments of the present disclosure.

FIG. 8A illustrates power consumption according to state transition in a3G communication system of the related art, and FIG. 8B illustratespower consumption in accordance with a power saving operation accordingto the embodiments of the present disclosure.

Referring to FIG. 8A, data transmission is stopped, and high power ofCELL_DCH state is consumed during the inactivity time of t1 (period P3)by a command from a base station. On the contrary, referring to FIG. 8B,the power of CELL_DCH state is consumed only during the time t11 (periodP31) that is shorter than t1, and then the power mode is changed to theCELL_DCH low power mode during the time of t1-t11 (period P32). In theCELL_DCH low power mode, power is less consumed than in the CELL_DCHstate, i.e. CELL_DCH high power mode. Thus, by as much as thisdifference, power consumption may be reduced.

FIGS. 9A and 9B are diagrams illustrating that power consumption isreduced according to embodiments of the present disclosure. FIG. 9Aillustrates power consumption according to state transition in a 4Gcommunication system of the related art, and FIG. 9B illustrates powerconsumption in accordance with a power saving operation according to anembodiment of the present disclosure.

Referring to FIG. 9A, data transmission is stopped and high power ofRRC_CONNECTED state is consumed during the inactivity time of t1 (periodP13) by a command from a base station. On the contrary, referring toFIG. 9B, the power of RRC_CONNECTED state is consumed only during thetime t11 (period P131) that is shorter than t1, and then the power modeis changed to the RRC_CONNECTED low power mode during the time of t1-t11(period P132). In the RRC_CONNECTED low power mode, power is lessconsumed than in the RRC_CONNECTED state, i.e. RRC_CONNECTED normalpower mode. Thus, by as much as this difference, power consumption maybe reduced.

FIGS. 10A to 10C are diagrams illustrating various modifications of apower saving operation according to embodiments of the presentdisclosure. These diagrams illustrate various examples of the powersaving operation performed by the control unit 510 illustrated in FIGS.5A to 5D.

FIG. 10A is a diagram illustrating a power saving operation performedaccording to an embodiment of the present disclosure.

Referring to FIG. 10A, it is exemplarily illustrated that thetransceiver 505 includes Digital BB (DBB) units 532 and 534, Analog BB(ABB) units 536 and 538, RF integrated circuits (ICs) 542 and 544, and aPower Amplifier (PA) 546. However, it should be noted that variousembodiments of the present disclosure are not limited thereto. The DBBunits 532 and 534 and the ABB units 536 and 538 constitute the BB unitof the transceiver 505. The RF ICs 542 and 544 and the power amplifier546 constitute the RF unit of the transceiver 505. The DBB unit 532, theABB unit 536, and the RF IC 542 are components on a reception path, andthe DBB unit 534, the ABB unit 538, the RF IC 544, and the poweramplifier 546 are components on a transmission path. Here, this divisionof the components of the transceiver is merely for differentiating thecomponents by the transmission and reception paths and functions basedon data processing operations. Therefore, in the case where thecomponents are actually implemented as chips, the components may bedifferently implemented. For example, the DBB units 532 and 534 and theABB units 536 and 538 may be implemented as a single chip. For anotherexample, the DBB units 532 and 534 may be implemented as a single chip,and the ABB units 536 and 538 may be implemented as another single chip.For another example, the RF ICs 542 and 544 may be implemented as asingle chip. For another example, the DBB units 532 and 534, the ABBunits 536 and 538, and the RF ICs 542 and 544 may be implemented as asingle chip. The DBB units 532 and 534 may include a processor, a memoryand etc. The ABB units 536 and 538 may include an ADC, filter and etc.The RF ICs 542 and 544 may include an analog filter, a low noiseamplifier, a mixer, a VCO, a frequency synthesizer and etc.

In the antenna path unit 550, transmitting antennas and receivingantennas may be combined. Although it is illustrated that onetransmitting antenna ANT_TX is combined with two receiving antennasANT_RX1 and ANT_RX2, the numbers of the antennas are not limited. Theantenna path unit 550 forms reception paths between the receivingantennas ANT_RX1 and ANT_RX2 and a receiver (RF IC 542), or a receptionpath between the transmitting antenna ANT_TX and a transmitter (poweramplifier 546). This antenna path unit 550 may include a switch.

These electronic device components may be operated in the normal powermode or low power mode according to a power mode control signal providedfrom the control unit 510 illustrated in FIGS. 5A to 5D. In the normalpower mode, power is normally supplied to the components. Here, thenormal power represents a voltage that is supplied in the active statesuch as the CELL_DCH state or RRC_CONNECTED state where datatransmission/reception is enabled. The control signal is a signal fortriggering the low power mode when the control unit 510 detects the datanon-transmission period where data transmission/reception does not occurduring the predefined time by monitoring the control channel ortransmission data. The control signal may be provided to partialcomponents from among the antenna path unit 550, the power amplifier546, the RF ICs 542 and 544, the ABBs 536 and 538, and the DBBs 532 and534.

FIG. 10B is a diagram illustrating a power saving operation performedaccording to an embodiment of the present disclosure.

Referring to FIG. 10B, the control unit 510 (not illustrated) blocks atleast one of the paths between the transceiver and the plurality ofantennas when the data non-transmission period is detected during apredefined time in the active state where data transmission/reception isenabled. The control unit 510 may block power supplied to components ofthe transceiver which correspond to the blocked path. The predefinedtime may be set to be shorter that the time set to change the activestate to the idle state. The control unit 510 detects the datanon-transmission period where data transmission/reception does not occurduring the predefined time by monitoring the control channel ortransmission data in the active state. When the control unit 510 detectsthat there is data to be transmitted/received as a result of monitoring,the control unit 510 further performs an operation of opening theblocked paths between the transceiver and the plurality of antennas.

For example, when it is detected that there is not data to betransmitted to a base station and thus the power mode is changed to thelow power mode, a reception path (e.g. path 2) of the antenna path unit550 through one of the two receiving antennas ANT_RX1 and ANT_RX2 may beblocked in response to the power mode control signal. For anotherexample, in the case where a plurality of transmitting antennas ANT_TXexist, a transmission path of the antenna path unit 550 through one ofthe plurality of transmitting antennas may be blocked in response to thepower mode control signal. That is, when the reception path ortransmission path is blocked, power supplied to components of thetransceiver corresponding to the blocked path may also be blocked. Whenreception path 2 of the antenna path unit 550 is blocked, power suppliedto corresponding components (e.g. an analog filter, a low noise filter,and a mixer) of the RF IC 542 may also be blocked. The antenna unit 500may include partial elements (e.g. capacitor) supplied with power, inaddition to the plurality of antennas. In this case, an operation ofblocking paths between partial antennas and the transceiver and anoperation of blocking the power supplied to the partial elements may befurther included. Therefore, since the power supplied to components ofthe transceiver corresponding to the blocked paths of the antenna pathunit 550 and/or elements that may be included in the antenna unit 500 isblocked, power consumption may be reduced.

FIG. 10C is a diagram illustrating a power saving operation performedaccording to an embodiment of the present disclosure.

Referring to FIG. 10C, the control unit 510 (not illustrated) low-poweradjusts power supplied to at least one of a plurality of components ofthe transceiver when the data non-transmission period is detected duringa predefined time in the active state where data transmission/receptionis enabled. The predefined time may be set to be shorter than the timeset to change the active state to the idle state. The control unit 510detects the data non-transmission period where datatransmission/reception does not occur during the predefined time bymonitoring the control channel or transmission data in the active state.When the control unit 510 detects that there is data to betransmitted/received as a result of monitoring, the control unit 510performs an operation of normalizing the low-power adjusted power.

For example, a power supply voltage supplied to partial components fromamong components of the DBB units 532 and 534, the ABB units 536 and538, the RF ICs 542 and 544, and the power amplifier 546 may be adjustedto be decreased in response to the power mode control signal in the lowpower mode. For example, when it is detected that there is not data tobe transmitted to a base station and thus the power mode is changed tothe low power mode, a level of the power supply voltage supplied topartial components (e.g. power amplifier) from internal components ofthe DBB unit 532, the ABB unit 536, and the RF IC 542 may be adjusted tobe decreased. For another example, in the case of performing a 10-stepconversion operation of an ADC included in the ABB unit 536, the powersupply voltage may be such supplied that only 5 steps are performed.

As described above, according to various embodiments of the presentdisclosure, it is detected whether there is data to betransmitted/received when a mobile electronic device such as asmartphone or a cell phone is in an active state where datatransmission/reception is enabled. As a result of the detection, thepower mode is changed to the low power mode in a data stop period thereis not data to be transmitted/received. Power is less consumed in thelow power mode than in the active state where high power is consumed,thereby reducing power consumption of the mobile electronic device.

According to the various embodiments of the present disclosure, programcommands for performing operations implemented by various computers maybe recorded in a computer-readable medium. The computer readable mediummay include one or a combination of a program command, a data file, anda data structure. The program command may be specially designed for thepresent disclosure or may be well known and available in the art.Examples of the computer readable recording medium include hardwaredevices specially configured to store and perform the program commands,such as hard disks, floppy disks, magnetic media such as magnetic tapes,optical media such as CD-ROMs and DVDs, magneto-optical media such asoptical disks, ROMs, RAMs, and flash memories. Examples of the programcommand include machine language codes made by compilers and high-levellanguage codes that can be executed by computers using interpreters. Inthe case where a part or the entirety of the mobile electronic devicesdescribed in the present disclosure is implemented as a computerprogram, a computer-readable recording medium in the computer program isstored is also included in the present disclosure.

Therefore, the scope of the present disclosure is defined not by thedetailed description of the present disclosure but by the appendedclaims, and all differences within the scope will be construed as beingincluded in the present disclosure.

While the present disclosure has been shown and described with referenceto various embodiments thereof, it will be understood by those skilledin the art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the present disclosure asdefined by the appended claims and their equivalents.

What is claimed is:
 1. A mobile electronic device comprising: aplurality of antennas; and a transceiver, wherein the transceiver isconfigured to comprise a control unit configured to switch to a lowpower mode to operate in the low power mode, or to operate at least oneof the plurality of antennas in the low power mode when a datanon-transmission period occurs in an active state.
 2. The device ofclaim 1, wherein the control unit is configured to detect the datanon-transmission period where data transmission/reception is notperformed for a certain time in the active state.
 3. The device of claim2, wherein the certain time is shorter than a time defined fortransition from the active state to an idle state.
 4. The device ofclaim 2, wherein the control unit is configured to detect the datanon-transmission period where data transmission/reception is notperformed for the certain time by monitoring a control channel ortransmission data in the active state.
 5. The device of claim 4, whereinthe control unit is configured to operate the transceiver in a normalpower mode or operate the plurality of antennas in the normal power modewhen it is detected that there is data to be transmitted/received as aresult of the monitoring in the low power mode.
 6. The device of claim4, wherein the control channel comprises one of a High Speed-SharedControl Channel (HS-SCCH) and a Physical Downlink Control Channel(PDCCH).
 7. The device of claim 1, wherein the control unit isconfigured to operate at least one of the plurality of antennas in thelow power mode by blocking at least one path between the transceiver andthe plurality of antennas in the low power mode.
 8. The device of claim1, wherein the control unit is configured to operate the transceiver inthe low power mode by making a low-power adjustment of power supplied toat least one component of the transceiver.
 9. The device of claim 8,wherein the at least one component of the transceiver is one of a radiofrequency unit and a baseband unit.
 10. The device of claim 8, whereinthe at least one component of the transceiver comprises a component on areception path when the data non-transmission period where datareception is not performed occurs in the active state, or a component ona transmission path when the data non-transmission period where datatransmission is not performed occurs in the active state.
 11. The deviceof claim 1, wherein the control unit is included in a Radio Frequency(RF) unit or a baseband unit of the transceiver.
 12. A mobile electronicdevice comprising: a plurality of antennas; and a transceiver, whereinthe transceiver is configured to comprise a control unit configured toblock at least one path between the transceiver and the plurality ofantennas when a data non-transmission period occurs in an active state.13. The device of claim 12, wherein the control unit is configured toblock power supplied to at least one component of the transceivercorresponding to the at least one path.
 14. The device of claim 13,wherein the at least one component of the transceiver is one of a radiofrequency unit and a baseband unit.
 15. The device of claim 13, whereinthe control unit is configured to detect the data non-transmissionperiod where data transmission/reception is not performed for a certaintime in the active state.
 16. The device of claim 15, wherein thecertain time is shorter than a time defined for transition from theactive state to an idle state.
 17. The device of claim 15, wherein thecontrol unit is configured to detect the data non-transmission periodwhere data transmission/reception is not performed for the certain timeby monitoring a control channel or transmission data in the activestate.
 18. The device of claim 17, wherein the control unit isconfigured to open the blocked path between the transceiver and theplurality of antennas and normally supply power to the component of thetransceiver corresponding to the at least one path when it is detectedthat there is data to be transmitted/received as a result of themonitoring.
 19. The device of claim 17, wherein the control channelcomprises one of a High Speed-Shared Control Channel (HS-SCCH) and aPhysical Downlink Control Channel (PDCCH).
 20. The device of claim 12,wherein the control unit is included in a Radio Frequency (RF) unit or abaseband unit of the transceiver.
 21. A mobile electronic devicecomprising: a transceiver comprising a plurality of components, whereinthe transceiver is configured to comprise a control unit configured toadjust power supplied to at least one of the plurality of components toa low-power mode when a data non-transmission period occurs in an activestate.
 22. The device of claim 21, wherein the control unit isconfigured to detect the data non-transmission period where datatransmission/reception is not performed for a certain time in the activestate.
 23. The device of claim 22, wherein the certain time is shorterthan a time defined for transition from the active state to an idlestate.
 24. The device of claim 22, wherein the control unit isconfigured to detect the data non-transmission period where datatransmission/reception is not performed for the certain time bymonitoring a control channel or transmission data in the active state.25. The device of claim 24, wherein the control unit is configured tonormalize the adjusted power from the low-power mode when it is detectedthat there is data to be transmitted/received as a result of themonitoring.
 26. The device of claim 24, wherein the control channelcomprises one of a High Speed-Shared Control Channel (HS-SCCH) and aPhysical Downlink Control Channel (PDCCH).
 27. The device of claim 21,wherein the control unit is included in a Radio Frequency (RF) unit abaseband unit of the transceiver.
 28. The device of claim 21, whereinthe at least one component of the transceiver is one of a radiofrequency unit and a baseband unit.
 29. An operation method of a mobileelectronic device comprising a plurality of antennas and a transceiver,the method comprising: detecting occurrence of a data non-transmissionperiod in an active state; and operating the transceiver in a low powermode or operating at least one of the plurality of antennas in the lowpower mode through switching to the low power mode when the occurrenceof the data non-transmission period is detected in the active state. 30.The method of claim 29, wherein the detecting of the datanon-transmission period in the active state comprises: detecting thedata non-transmission period where data transmission/reception is notperformed for a certain time in the active state.
 31. The method ofclaim 30, wherein the certain time is shorter than a time defined fortransition from the active state to an idle state.
 32. The method ofclaim 30, wherein the detecting of the data non-transmission period inthe active state comprises: detecting the data non-transmission periodby monitoring a control channel or transmission data in the activestate.
 33. The method of claim 32, further comprising operating thetransceiver in a normal power mode or operating the plurality ofantennas in the normal power mode when it is detected that there is datato be transmitted/received as a result of the monitoring in the lowpower mode.
 34. The method of claim 32, wherein the control channelcomprises one of a High Speed-Shared Control Channel (HS-SCCH) and aPhysical Downlink Control Channel (PDCCH).
 35. The method of claim 29,wherein the operating of the transceiver in the low power mode or theoperating of the at least one of the plurality of antennas in the lowpower mode comprises: operating the at least one of the plurality ofantennas in the low power mode by blocking at least one of paths betweenthe transceiver and the plurality of antennas in the low power mode. 36.The method of claim 29, wherein the operating of the transceiver in thelow power mode or the operating of the at least one of the plurality ofantennas in the low power mode comprises: operating the transceiver inthe low power mode by making a low-power adjustment of power supplied toat least one component of the transceiver in the low power mode.
 37. Themethod of claim 36, wherein the at least one component of thetransceiver is one of a radio frequency unit and a baseband unit. 38.The method of claim 36, wherein the at least one component of thetransceiver comprises a component on a reception path when the datanon-transmission period where data reception is not performed occurs inthe active state.
 39. The method of claim 36, wherein the at least onecomponent of the transceiver is a component on a transmission path whenthe data non-transmission period where data transmission is notperformed occurs in the active state.
 40. An operation method of amobile electronic device comprising a plurality of antennas and atransceiver, the method comprising: detecting occurrence of a datanon-transmission period in an active state; and blocking at least onepath between the transceiver and the plurality of antennas when theoccurrence of the data non-transmission period is detected in the activestate.
 41. The method of claim 40, further comprising blocking powersupplied to at least one component of the transceiver corresponding tothe at least one path.
 42. The method of claim 41, wherein the at leastone component of the transceiver is one of a radio frequency unit and abaseband unit.
 43. The method of claim 41, wherein the detecting of thedata non-transmission period in the active state comprises: detectingthe data non-transmission period where data transmission/reception isnot performed for a certain time in the active state.
 44. The method ofclaim 43, wherein the certain time is shorter than a time defined fortransition from the active state to an idle state.
 45. The method ofclaim 43, wherein the detecting of the data non-transmission period inthe active state comprises: detecting the data non-transmission periodwhere data transmission/reception is not performed for the certain timeby monitoring a control channel or transmission data in the activestate.
 46. The method of claim 45, further comprising opening theblocked path between the transceiver and the plurality of antennas andnormally supplying power to the component of the transceivercorresponding to the at least one path when it is detected that there isdata to be transmitted/received as a result of the monitoring.
 47. Themethod of claim 45, wherein the control channel comprises one of a HighSpeed-Shared Control Channel (HS-SCCH) and a Physical Downlink ControlChannel (PDCCH).
 48. An operation method of a mobile electronic devicecomprising a transceiver having a plurality of components, the methodcomprising: detecting occurrence of a data non-transmission period in anactive state; and making a low-power adjustment of power supplied to atleast one of the plurality of components to a low-power mode when theoccurrence of the data non-transmission period is detected in the activestate.
 49. The method of claim 48, wherein the detecting of the datanon-transmission period in the active state comprises: detecting thedata non-transmission period where data transmission/reception is notperformed for a certain time in the active state.
 50. The method ofclaim 49, wherein the certain time is shorter than a time defined fortransition from the active state to an idle state.
 51. The method ofclaim 49, wherein the detecting of the data non-transmission period inthe active state comprises: detecting the data non-transmission periodwhere data transmission/reception is not performed for the certain timeby monitoring a control channel or transmission data in the activestate.
 52. The method of claim 51, further comprising normalizing thelow-power adjusted power when it is detected that there is data to betransmitted/received as a result of the monitoring.
 53. The method ofclaim 51, wherein the control channel comprises one of a HighSpeed-Shared Control Channel (HS-SCCH) and a Physical Downlink ControlChannel (PDCCH).
 54. The method of claim 48, wherein the at least one ofthe components of the transceiver is one of a radio frequency unit and abaseband unit.
 55. A mobile electronic device comprising: a plurality ofantennas; a transceiver; and a control unit configured to switch to alow power mode to operate the transceiver in the low power mode, or tooperate at least one of the plurality of antennas in the low power modewhen a data non-transmission period occurs in an active state.
 56. Thedevice of claim 55, wherein the control unit is configured to detect thedata non-transmission period where data transmission/reception is notperformed for a certain time in the active state.
 57. The device ofclaim 56, wherein the certain time is shorter than a time defined fortransition from the active state to an idle state.
 58. The device ofclaim 56, wherein the control unit is configured to detect the datanon-transmission period where data transmission/reception is notperformed for the certain time by monitoring a control channel ortransmission data in the active state.
 59. The device of claim 58,wherein the control unit is configured to operate the transceiver in anormal power mode or to operate the plurality of antennas in the normalpower mode when it is detected that there is data to betransmitted/received as a result of the monitoring in the low powermode.
 60. The device of claim 58, wherein the control channel comprisesone of a High Speed-Shared Control Channel (HS-SCCH) and a PhysicalDownlink Control Channel (PDCCH).
 61. The device of claim 55, whereinthe control unit is configured to operate at least one of the pluralityof antennas in the low power mode by blocking at least one path betweenthe transceiver and the plurality of antennas in the low power mode. 62.The device of claim 55, wherein the control unit is configured tooperate the transceiver in the low power mode by low-power adjustingpower supplied to at least one component of the transceiver.
 63. Thedevice of claim 62, wherein the at least one component of thetransceiver is one of a radio frequency unit and a baseband unit. 64.The device of claim 62, wherein the at least one component of thetransceiver comprises a component on a reception path when the datanon-transmission period where data reception is not performed occurs inthe active state, or a component on a transmission path when the datanon-transmission period where data transmission is not performed occursin the active state.
 65. A mobile electronic device comprising: aplurality of antennas; a transceiver; and a control unit configured toblock at least one path between the transceiver and the plurality ofantennas when a data non-transmission period occurs in an active state.66. The device of claim 65, wherein the control unit is configured toblock power supplied to at least one component of the transceivercorresponding to the at least one path.
 67. The device of claim 66,wherein the at least component of the transceiver is one of a radiofrequency unit and a baseband unit.
 68. The device of claim 66, whereinthe control unit is configured to detect the data non-transmissionperiod where data transmission/reception is not performed for a certaintime in the active state.
 69. The device of claim 68, wherein thecertain time is shorter than a time defined for transition from theactive state to an idle state.
 70. The device of claim 68, wherein thecontrol unit is configured to detect the data non-transmission periodwhere data transmission/reception is not performed for the certain timeby monitoring a control channel or transmission data in the activestate.
 71. The device of claim 70, wherein the control unit isconfigured to open the blocked path between the transceiver and theplurality of antennas and normally supply power to the component of thetransceiver corresponding to the at least one path when it is detectedthat there is data to be transmitted/received as a result of themonitoring.
 72. The device of claim 70, wherein the control channelcomprises one of a High Speed-Shared Control Channel (HS-SCCH) and aPhysical Downlink Control Channel (PDCCH).
 73. A mobile electronicdevice comprising: a transceiver comprising a plurality of components;and a control unit configured to adjust power supplied to at least oneof the plurality of components to a low power mode when a datanon-transmission period occurs in an active state.
 74. The device ofclaim 73, wherein the control unit is configured to detect the datanon-transmission period where data transmission/reception is notperformed for a certain time in the active state.
 75. The device ofclaim 74, wherein the certain time is shorter than a time defined fortransition from the active state to an idle state.
 76. The device ofclaim 74, wherein the control unit is configured to detect the datanon-transmission period where data transmission/reception is notperformed for the certain time by monitoring a control channel ortransmission data in the active state.
 77. The device of claim 76,wherein the control unit is configured to normalize the low-poweradjusted power when it is detected that there is data to betransmitted/received as a result of the monitoring.
 78. The device ofclaim 76, wherein the control channel comprises one of a HighSpeed-Shared Control Channel (HS-SCCH) and a Physical Downlink ControlChannel (PDCCH).
 79. The device of claim 73, wherein the at least one ofthe plurality of components of the transceiver is one of a radiofrequency unit and a baseband unit.